Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2021	$ 732,021	$ 108,610	$ 623,465	$ (54)
Balance, Shares at Dec. 31, 2021		24,260,000
Net income	115,138		115,138
Share-based compensation	8,009	$ 8,009
Common stock issued under stock Plans, net of shares withheld for employee taxes, Shares		128,000
Taxes paid related to net share settlement of stock awards	(6,539)	$ (6,539)
Dividends accrued at $1.82, $1.86 and $1.90 per share in 2022, 2023 and 2024	(44,660)		(44,660)
Other comprehensive loss	(24)			(24)
Balance at Dec. 31, 2022	803,945	$ 110,080	693,943	(78)
Balance, Shares at Dec. 31, 2022		24,388,000
Net income	174,621		174,621
Share-based compensation	8,275	$ 8,275
Common stock issued under stock Plans, net of shares withheld for employee taxes, Shares		108,000
Taxes paid related to net share settlement of stock awards	(7,233)	$ (7,233)
Dividends accrued at $1.82, $1.86 and $1.90 per share in 2022, 2023 and 2024	(45,768)		(45,768)
Other comprehensive loss	(38)			(38)
Balance at Dec. 31, 2023	$ 933,802	$ 111,122	822,796	(116)
Balance, Shares at Dec. 31, 2023	24,496,000	24,496,000
Net income	$ 231,727		231,727
Share-based compensation	9,502	$ 9,502
Common stock issued under stock Plans, net of shares withheld for employee taxes, Shares		55,000
Taxes paid related to net share settlement of stock awards	(4,371)	$ (4,371)
Dividends accrued at $1.82, $1.86 and $1.90 per share in 2022, 2023 and 2024	(47,408)		(47,408)
Other comprehensive loss reclassification adjustment	116			$ 116
Balance at Dec. 31, 2024	$ 1,123,368	$ 116,253	$ 1,007,115
Balance, Shares at Dec. 31, 2024	24,551,000	24,551,000